Question

1.writ 1st term and common difference of a.p 3,1,-1,-3....
2.check whether the following are a.p or not a. 2,4,8,16... b. 1,5,9,13...
3.find 20th term of a.p,10,7,4...
4.which term of a.p 3,8,13,18....is78.
5.which term of 3,15,27,39...will be132 more than its 54th term.
6.find the sum of a.p 2,7,12,...to 10 terms.
7.find the sum of first 15 multiple of 8.
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Answer 1

Step-by-step explanation:

1. a =3

2. a . it is not an ap

b it is an ap.

3.-47

4. 16 term

5. 65 term

6. 245

7. 512